%A LI Zhixin, LI Xin, FAN Lichao, HAN Wenyan %T Effects of Exogenous 24-epibrassinolide on the Photosynthetic Characteristics of Tea Plants (Camellia sinensis) %0 Journal Article %D 2015 %J Journal of Tea Science %R 10.13305/j.cnki.jts.2015.06.005 %P 543-550 %V 35 %N 6 %U {https://www.tea-science.com/CN/abstract/article_947.shtml} %8 2015-12-15 %X 24-epibrassinolide (EBR) is an important plant hormone, which plays an important role in a variety of adverse resistance in plants. The effects of exogenous EBR on photosynthesis, Rubisco and FBPase activity and the expression of related-gene from tea leaves (Camellia sinensis cv. ‘Longjing 43’, ‘Xiangguliaobaihao’, and ‘Qingmingzao’) under field condition were investigated. It was showed that after exogenous EBR (0.1βmg·L-1) treatment: Net photosynthetic rate of these three cultivars increased by 49.06%, 45.49% and 92.34% respectively. Vcmax increased by 21.82%, 21.68 % and 21.68%, and Jmax increased by 17.16%, 23.86% and 23.86%, respectively. The activity of Rubisco and FBPase increased significantly. Furthermore, the expression of Rubisco and FBPase related-gene increased significantly. These results suggested that application of exogenous EBR could enhance Vcmax, Jmax and the activity of Rubisco and FBPase effectively, which ultimately promoted the photosynthetic carbon fixation, and the photosynthetic rate of tea plants.